Corneal Astigmatism Measurement Study

This study has been completed.
Sponsor:
Information provided by (Responsible Party):
Alcon Research
ClinicalTrials.gov Identifier:
NCT00818532
First received: January 6, 2009
Last updated: April 6, 2012
Last verified: July 2009

January 6, 2009
April 6, 2012
December 2008
April 2009   (final data collection date for primary outcome measure)
Measurement of corneal power [ Time Frame: Day 1 ] [ Designated as safety issue: No ]
Same as current
Complete list of historical versions of study NCT00818532 on ClinicalTrials.gov Archive Site
Not Provided
Not Provided
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Corneal Astigmatism Measurement Study
Not Provided

To assess which commercially available measurement device is most accurate in measuring low (< 1.0 D) degrees of corneal astigmatism.

Not Provided
Observational
Time Perspective: Prospective
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Non-Probability Sample

community sample

Astigmatism
Not Provided
1
Measurement device
Not Provided

*   Includes publications given by the data provider as well as publications identified by ClinicalTrials.gov Identifier (NCT Number) in Medline.
 
Completed
50
April 2009
April 2009   (final data collection date for primary outcome measure)

Inclusion Criteria:

  • 50 years of age and older
  • Proof of eye exam within the last 3 months
  • Corneal astigmatism of <1.0 diopter

Exclusion Criteria:

  • Prior history of refractive or corneal surgery
  • Corneal trauma/disease
  • Intraocular surgery
Both
50 Years and older
Yes
Contact information is only displayed when the study is recruiting subjects
United States
 
NCT00818532
P-08-04
No
Alcon Research
Alcon Research
Not Provided
Not Provided
Alcon Research
July 2009

ICMJE     Data element required by the International Committee of Medical Journal Editors and the World Health Organization ICTRP